This thing is a cap to fit a 70mm diameter can.
I made it to be able to close a partially used can of cat food to avoid bad smell in the fridge because this kind of food really stinks !
Print in ABS with something like 80 or 100 % infill and just one shell.
Clip it on a partially used 70mm can.
I don't have soft material but if you do have some it might be interesting to use that instead.
If you do so please let me know how it performs.